毛细吸液芯换热板的设计与实验  

Design and experimental analysis of the heat transfer panel with capillary imbibition core

作　　者：童明伟[1] 胡鹏[1] 杨颖[1] 刘彬[1] 吴中正[1] 

机构地区：[1]重庆大学动力工程学院,重庆400044

出　　处：《重庆大学学报（自然科学版）》2011年第8期8-12,共5页Journal of Chongqing University

基　　金：国家科技支撑计划资助项目(2007BAB21B02-1);重庆大学211工程'三期建设'项目(S-09101)

摘　　要：提出了由柠檬酸钾-石膏配制而成的毛细吸液芯换热板,用水作冷却介质时柠檬酸钾-石膏板就成了一块通流率为55.3%的均布流道。通过改变毛细吸液芯换热板的表面发射率(低发射率0.23,高发射率0.95)及冷水温度(7～18℃),在维持室内温度为26℃(±1℃)情况下,对平均孔隙半径r=0.015 mm,孔隙率55.3%的毛细吸液芯换热板的换热特性进行研究。结果表明,在高发射率条件下,毛细吸液芯换热板的制冷量满足常规辐射空调要求,与蛇形辐射换热管相比初成本减少了80%,并回归出毛细吸液芯换热板的传热准则方程:Nu=0.029Re0.21Pr2.6θ0.7。为建立完整的毛细吸液芯换热板设计理论提供了依据。Serpentine radiant heat transfer pipes（SRHTP）are expensive and with low heat exchanged,so the heat transfer panel with capillary imbibition core（HTPCIC） is put forward.HTPCIC is composed by potassium citrate-plaster（PCP）,and PCP board becomes a uniform channel of which the flow rate is 55.3% when water is cooling medium.By changing the emissivity of HTPCIC＇ surface（low emissivity 0.23,high emissivity 0.95）and the temperature of cold-water（7~18 ℃）,at 26 ℃（±1 ℃）,heat transfer characteristics of HTPCIC are analyzed whose average pore radius is 0.015 mm and porosity is 55.3%.The experimental results show that the cooling capacity of HTPCIC meets the requirements of conventional radiation air-conditioning,and compared with SRHTP,the initial cost reduces by 80%.Moreover,regression equation of the HTPCIC heat transfer guideline is proposed： Nu=0.029Re0.21Pr2.6θ0,which provides basis for establishing a complete design theory.

关 键 词：辐射换热 温度分布 空调 传热准则 

分 类 号：TK264.1[动力工程及工程热物理—动力机械及工程]